<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>列表排序</title>
    <script src="../js/vue.js"></script>
  </head>

  <body>
    <div id="root">
      <h2>人员列表</h2>
      <input type="text" placeholder="请输入名字" v-model="keyWord" />
      <button @click="sortType = 2">年龄升序</button>
      <button @click="sortType = 1">年龄降序</button>
      <button @click="sortType = 0">原顺序</button>
      <ul>
        <li v-for="p in filPersons" :key="p.id">
          {{p.name}}-{{p.age}}-{{p.sex}}
        </li>
      </ul>
    </div>
  </body>
  <script>
    Vue.config.productionTip = false;

    new Vue({
      el: "#root",
      data: {
        keyWord: "",
        sortType: 0, // 0代表原顺序；1代表降序；2代表升序
        persons: [
          { id: "001", name: "马冬梅", age: 36, sex: "女" },
          { id: "002", name: "周冬雨", age: 47, sex: "女" },
          { id: "003", name: "周杰伦", age: 27, sex: "男" },
          { id: "004", name: "温兆伦", age: 57, sex: "男" },
        ],
      },
      computed: {
        filPersons() {
          const arr = this.persons.filter((p) => {
            return p.name.indexOf(this.keyWord) !== -1;
          });

          if (this.sortType) {
            arr.sort((p1, p2) => {
              return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age;
            });
          }

          return arr;
        },
      },
    });
  </script>
</html>
